CN102764963A - Method for machining, detecting, riveting and assembling earless pallet self-locking nut with elliptical head - Google Patents

Method for machining, detecting, riveting and assembling earless pallet self-locking nut with elliptical head Download PDF

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Publication number
CN102764963A
CN102764963A CN2012102673469A CN201210267346A CN102764963A CN 102764963 A CN102764963 A CN 102764963A CN 2012102673469 A CN2012102673469 A CN 2012102673469A CN 201210267346 A CN201210267346 A CN 201210267346A CN 102764963 A CN102764963 A CN 102764963A
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CN
China
Prior art keywords
earless
supporting plate
lock nut
self
cold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012102673469A
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Chinese (zh)
Inventor
魏敏真
彭伟胜
罗来源
陈金云
熊小山
胡沛民
赵辉
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Jiangxi Hongdu Aviation Industry Group Co Ltd
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Jiangxi Hongdu Aviation Industry Group Co Ltd
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Publication date
Application filed by Jiangxi Hongdu Aviation Industry Group Co Ltd filed Critical Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority to CN2012102673469A priority Critical patent/CN102764963A/en
Publication of CN102764963A publication Critical patent/CN102764963A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a method for machining, detecting, riveting and assembling an earless pallet self-locking nut with an elliptical head, comprising the following processes of: cold heading, threading, tapping, closing and detecting. The aperture of a cold heading female die is determined according to the diameter of a raw material stainless steel wire and the clearance of the female die, the size of the cold heading female die is determined by more than two cold heading tests, so that the qualified blank of the earless pallet self-locking nut is made on a cold heading machine; a forming cutter used for processing a thin-wall slot is cut out by linear cutting; end closing for the self-locking nut is performed on a punch by a matched closing punch die; two-claw callipers with a dial indicator is modulated in order to detect the diameter of the thin-wall slot. When assembly, a cylindrical hole is pre-drilled in a sandwich plate, a 76-DEG elliptic cone end hole is reamed in the sandwich plate, then, the pallet self-locking nut is inserted, and then, the earless pallet self-locking nut with the elliptical head and the sandwich plate are pivoted and assembled by using a riveting gun. With the adoption of the method, the problem in machining, detecting and riveting the pallet self-locking nut is solved, and the riveting percent of pass is up to 100%.

Description

A kind of oval head earless supporting plate self-lock nut processing, detection and riveted joint assembly method
Technical field
The present invention relates to a kind of securing member, particularly a kind of oval head earless supporting plate self-lock nut processing, detection and riveted joint assembly method.
Background technology
The position that aircraft has need lift removable plug-in device or the hangers bolt that is used to lift by crane is installed through bolt, and mostly these parts are thin sheet metal structural, unsuitable tapping, and also nut is positioned at the unworkable concealment part of spanner; If leave the special-purpose flap that path is installed for this reason, possibly influence structural strength and perhaps gain in weight.
The material of oval head earless supporting plate self-lock nut is a stainless steel, and processing exists following problem:
(1) oval head cold-heading difficulty;
(2) that when riveted joint formed the bulge relation is very big for the diameter dimension of thin-walled groove, because of stainless steel material adheres to cutter easily, and diameter tolerance 0.05mm only, be difficult to guarantee;
(3) screwed hole of closed type self-locking nut is a blind hole, attacks to such an extent that squeeze bad end too deeply easily, cuts off screw tap;
(4) thread head must close up, and to guarantee auto-lock function, the closing in cross sectional shape is the triangular pyramid dihedral, and dimensional requirement is tighter;
(5) the thin-walled inside groove is a groove, can't measure with general slide calliper rule and micrometer, and because of its diameter minimum is merely 5.2mm, so little groove clamp are bought nowhere, so detection difficult.
Summary of the invention
The purpose of this invention is to provide a kind of solution oval head earless supporting plate self-lock nut in cold-heading, there is the method for a difficult problem in aspects such as car system, tapping, closing in, detection.
Technical scheme of the present invention is: a kind of oval head earless supporting plate self-lock nut processing and detection method, and step comprises cold-heading, car system, tapping, closing in, detection;
1, a kind of oval head earless supporting plate self-lock nut processing and detection method, step comprises cold-heading, car system, tapping, closing in, detection;
[1] cold-heading blank: the critical size of cold-heading blank is the external diameter and the oval head of supporting plate self-lock nut; They all are that size by the cold-heading former guarantees; The aperture of cold-heading former is confirmed through twice above cold-heading test according to the gap of cold-heading raw material stainless steel gauge of wire and cold-heading raw material stainless steel steel wire and former; The cold-heading former slotted eye of the said oval head of cold-heading adopts the processing of three coordinate CNC milling machines, upsets on cold headers with the cold-heading former that processes and makes the blank of earless supporting plate self-lock nut;
[2] car system: at the get on the bus thin-walled groove (1) of system self-locking nut of the numerically controlled lathe of six stations, add and will on numerical control cutting machine, adopt man-hour line to cut earlier, cut out the forming-tool that is used for processing thin-walled groove, point of a knife R=0.2mm, the oblique angle of point of a knife prism is 26 °; Use the special-purpose cutting fluid of commercially available HGS-113 to improve cutting ability; Stipulate that in technological procedure every thin-walled tank car system will be measured its diameter after accomplishing immediately, if measure the diameter of thin-walled groove will be overproof before, in time reconditioning once-forming cutter is guaranteed product quality;
[3] blind hole tapping: the spiral screw tap that the outsourcing chip removal is smooth, to the blind hole tapping, control the cutting speed and the degree of depth of screw tap, prevent the screw tap fracture; Use commercially available special-purpose cutting fluid to improve the tapping performance;
[4] close up in the self-locking nut end: will close up in the end of oval head earless supporting plate self-lock nut; To guarantee locking property; The closing in cross sectional shape is a triangle; Must reach the data of locking torque after the closing in through detection, Q/5A3159-4 plate nut locking torque will reach 2.0 N.m~3.3N.m; Adopt supporting closing in punch die on punch press, to carry out the self-locking nut end and close up, adopt ejector beam that oval head earless supporting plate self-lock nut is ejected from supporting punch die subsequently;
[5] two pawl clamp with the transformation of the way detect thin-walled groove diameter: commercially available dial gauge is added that homemade claw changes a social system termination width A=2.0 mm of claw, the termination thickness B of claw=3.0 mm, termination length H=15.5 mm of claw by following size.
The riveted joint assembly method of oval head earless supporting plate self-lock nut on sandwich plate:
[1] the first external cylindrical surface cylindrical hole movingly of preboring and oval head earless supporting plate self-lock nut on the sandwich plate that will rivet, ream goes out 60 ° of taper holes in the cylindrical hole outer end with a special-purpose stroke socket drill head then, respectively puts 8 ° to left and right, and ream goes out 76 ° of oval taper holes;
[2] put into oval head earless supporting plate self-lock nut the cylindrical hole of outer end band elliptic cone; Install special-purpose riveting gun; Start riveting gun and be rotated counterclockwise, the screw rod of riveting gun is stretched in advance and is screwed in oval head earless supporting plate self-lock nut, and the lining of riveting gun withstands the header planes of oval head earless supporting plate self-lock nut;
[3] start riveting gun again; The end of thread of the screw rod pulling oval head earless supporting plate self-lock nut of riveting gun is retreated; Under the effect of pulling force; The thin wall cylindrical portion of oval head earless supporting plate self-lock nut forms bulge near the sandwich plate place, and riveting gun turns clockwise and withdraws from screw rod then, and riveting gun separates with the oval head earless supporting plate self-lock nut of on sandwich plate, having riveted; The riveted joint of oval head earless supporting plate self-lock nut on sandwich plate assembled successfully;
The invention has the beneficial effects as follows to have solved oval head earless supporting plate self-lock nut in cold-heading, the whole difficult problems that aspects such as car system, tapping, closing in, detection exist, the part that processes riveted joint qualification rate reaches 100%, and can satisfy matching requirements.
Description of drawings
Fig. 1 is the oval head earless supporting plate self-lock nut structure chart that the termination is opened wide.
Fig. 2 is that the termination is the oval head earless supporting plate self-lock nut structure chart of blind hole.
Fig. 3 is the forming-tool sketch map.
Fig. 4 measures the clamp sketch map with two pawls of the dial gauge transformation of the way.
Fig. 5 is that oval head earless supporting plate self-lock nut is when closing up and the sketch map of closing in punch die and ejector beam.
Fig. 6 is the vertical view of Fig. 5.
Fig. 7 is the sketch map that oval head earless supporting plate self-lock nut assembles on sandwich plate.
Fig. 8 is the sketch map that oval head earless supporting plate self-lock nut is riveted on sandwich plate.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment 1Shown in accompanying drawing 1~6: a kind of oval head earless supporting plate self-lock nut processing and detection method, step comprises cold-heading, car system, tapping, closing in, detection;
[1] cold-heading blank: the critical size of cold-heading blank is the external diameter and the oval head of supporting plate self-lock nut 1; They all are that size by the cold-heading former guarantees; The aperture of cold-heading former is confirmed through twice above cold-heading test according to the gap of cold-heading raw material stainless steel gauge of wire and cold-heading raw material stainless steel steel wire and former; The cold-heading former slotted eye of the said oval head of cold-heading adopts the processing of three coordinate CNC milling machines, upsets on cold headers with the cold-heading former that processes and makes the blank of earless supporting plate self-lock nut 1;
[2] car system: at the get on the bus thin-walled groove 2 of system self-locking nut of the numerically controlled lathe of six stations, add and will on numerical control cutting machine, adopt man-hour line to cut earlier, cut out the forming-tool that is used for processing thin-walled groove, point of a knife R=0.2mm, the oblique angle of point of a knife prism is 26 °; Use the special-purpose cutting fluid of commercially available HGS-113 to improve cutting ability; Stipulate that in technological procedure every thin-walled groove 2 car system will be measured its diameter after accomplishing immediately, if measure the diameter of thin-walled groove 2 will be overproof before, in time reconditioning once-forming cutter is guaranteed product quality;
[3] blind hole tapping: the spiral screw tap that the outsourcing chip removal is smooth, to the blind hole tapping, control the cutting speed and the degree of depth of screw tap, prevent the screw tap fracture; Use commercially available special-purpose cutting fluid to improve the tapping performance;
[4] close up in the self-locking nut end: will close up in the end of oval head earless supporting plate self-lock nut 1; To guarantee locking property; The closing in cross sectional shape is a triangle; Must reach the data of locking torque after the closing in through detection, Q/5A3159-4 plate nut locking torque will reach 2.0 N.m~3.3N.m; Adopt supporting closing in punch die 5 on punch press, to carry out the self-locking nut end and close up, adopt ejector beam 6 that oval head earless supporting plate self-lock nut 1 is ejected from supporting punch die subsequently;
[5] two pawl clamp with the transformation of the way detect thin-walled groove diameter: commercially available dial gauge 3 is added that homemade claw 4 changes a social system termination width A=2.0 mm of claw, the termination thickness B of claw=3.0 mm, termination length H=15.5 mm of claw by following size.
Embodiment 2Shown in accompanying drawing 7-8: the riveted joint assembly method of oval head earless supporting plate self-lock nut on sandwich plate:
[1] the first external cylindrical surface cylindrical hole movingly of preboring and oval head earless supporting plate self-lock nut 1 on the sandwich plate that will rivet, ream goes out 60 ° of taper holes in the cylindrical hole outer end with a special-purpose stroke socket drill head then, respectively puts 8 ° to left and right, and ream goes out 76 ° of oval taper holes;
[2] put into oval head earless supporting plate self-lock nut 1 cylindrical hole of outer end band elliptic cone; Install special-purpose riveting gun; Starting riveting gun is rotated counterclockwise; The screw rod 7 of riveting gun is stretched in advance and is screwed in oval head earless supporting plate self-lock nut 1, and the lining 8 of riveting gun withstands the header planes of oval head earless supporting plate self-lock nut;
[3] start riveting gun again; The end of thread of the screw rod 7 pulling oval head earless supporting plate self-lock nuts of riveting gun is retreated; Under the effect of pulling force; The thin wall cylindrical portion 2 of oval head earless supporting plate self-lock nut forms bulge 10 near sandwich plate 9 places, and riveting gun turns clockwise and withdraws from screw rod then, and riveting gun separates with the oval head earless supporting plate self-lock nut 1 of on sandwich plate 9, riveting; The riveted joint of oval head earless supporting plate self-lock nut 1 on sandwich plate 9 assembled successfully.

Claims (2)

1. an oval head earless supporting plate self-lock nut is processed and detection method, and step comprises cold-heading, car system, tapping, closing in, detection;
[1] cold-heading blank: the critical size of cold-heading blank is the external diameter and the oval head of supporting plate self-lock nut; They all are that size by the cold-heading former guarantees; The aperture of cold-heading former is confirmed through twice above cold-heading test according to the gap of cold-heading raw material stainless steel gauge of wire and cold-heading raw material stainless steel steel wire and former; The cold-heading former slotted eye of the said oval head of cold-heading adopts the processing of three coordinate CNC milling machines, upsets on cold headers with the cold-heading former that processes and makes the blank of earless supporting plate self-lock nut (1);
[2] car system: at the get on the bus thin-walled groove (2) of system self-locking nut of the numerically controlled lathe of six stations, add and will on numerical control cutting machine, adopt man-hour line to cut earlier, cut out the forming-tool that is used for processing thin-walled groove, point of a knife R=0.2mm, the oblique angle of point of a knife prism is 26 °; Use the special-purpose cutting fluid of commercially available HGS-113 to improve cutting ability; Stipulate that in technological procedure every thin-walled tank car system will be measured its diameter after accomplishing immediately, if measure the diameter of thin-walled groove (2) will be overproof before, in time reconditioning once-forming cutter is guaranteed product quality;
[3] blind hole tapping: the spiral screw tap that the outsourcing chip removal is smooth, to the blind hole tapping, control the cutting speed and the degree of depth of screw tap, prevent the screw tap fracture; Use commercially available special-purpose cutting fluid to improve the tapping performance;
[4] close up in the self-locking nut end: will close up in the end of oval head earless supporting plate self-lock nut (1); To guarantee locking property; The closing in cross sectional shape is a triangle; Must reach the data of locking torque after the closing in through detection, Q/5A3159-4 plate nut locking torque will reach 2.0 N.m~3.3N.m; Adopt supporting closing in punch die (5) on punch press, to carry out the self-locking nut end and close up, adopt ejector beam (6) that oval head earless supporting plate self-lock nut (1) is ejected from supporting punch die (5) subsequently;
[5] two pawl clamp with the transformation of the way detect thin-walled groove diameter: commercially available dial gauge (3) is added that homemade claw (4) is by the following size transformation of the way; Termination width A=2.0 mm of claw (4); The termination thickness B of claw (4)=3.0 mm, termination length H=15.5 mm of claw (4).
2. the riveted joint assembly method of the said oval head earless of claim 1 supporting plate self-lock nut on sandwich plate:
[1] the external cylindrical surface cylindrical hole movingly of preboring and oval head earless supporting plate self-lock nut is gone up by elder generation at the sandwich plate that will rivet (9); Ream goes out 60 ° of taper holes in the cylindrical hole outer end with the special-purpose socket drill head of drawing then; Respectively put 8 ° to left and right, ream goes out 76 ° of oval taper holes;
[2] put into oval head earless supporting plate self-lock nut (1) cylindrical hole of outer end band elliptic cone; Install special-purpose riveting gun; Starting riveting gun is rotated counterclockwise; The screw rod of riveting gun (7) is stretched in advance and is screwed in oval head earless supporting plate self-lock nut (1), and the lining of riveting gun (8) withstands the header planes of oval head earless supporting plate self-lock nut (1);
[3] start riveting gun again; The end of thread of the screw rod of riveting gun (7) pulling oval head earless supporting plate self-lock nut is retreated; Under the effect of pulling force; The thin wall cylindrical portion (2) of oval head earless supporting plate self-lock nut locates to form bulge (10) near sandwich plate (9), and riveting gun turns clockwise and withdraws from screw rod (7) then, and riveting gun separates with the oval head earless supporting plate self-lock nut (1) of upward riveting at sandwich plate (9); The riveted joint of oval head earless supporting plate self-lock nut (1) on sandwich plate (9) assembled successfully.
CN2012102673469A 2012-07-31 2012-07-31 Method for machining, detecting, riveting and assembling earless pallet self-locking nut with elliptical head Pending CN102764963A (en)

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CN2012102673469A CN102764963A (en) 2012-07-31 2012-07-31 Method for machining, detecting, riveting and assembling earless pallet self-locking nut with elliptical head

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103076165A (en) * 2012-12-27 2013-05-01 中国航空工业集团公司金城南京机电液压工程研究中心 Self-locking V-shaped structure nut detection method
CN103586633A (en) * 2013-10-31 2014-02-19 江西洪都航空工业集团有限责任公司 Method for machining stainless steel singe dual-lug support plate nut
CN105387053A (en) * 2015-12-14 2016-03-09 芜湖恒信汽车内饰制造有限公司 Riveting nut and assembly process thereof
CN107322236A (en) * 2017-06-22 2017-11-07 贵州精立航太科技有限公司 A kind of processing technology of high temperature supporting plate self-lock nut
CN109185311A (en) * 2018-10-30 2019-01-11 贵州航瑞科技有限公司 Titanium alloy tail portion seals earless plate nut and its processing method
CN109210065A (en) * 2018-10-30 2019-01-15 贵州航瑞科技有限公司 Titanium alloy earless plate nut and its processing method
CN111069850A (en) * 2019-11-30 2020-04-28 河南航天精工制造有限公司 Method for processing stainless steel tensile high-locking nut
CN113909574A (en) * 2021-09-30 2022-01-11 中国航空工业标准件制造有限责任公司 Groove machining method for earless supporting plate nut

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CN1532009A (en) * 2003-03-24 2004-09-29 ���½�ɷ����޹�˾ Process for producing rivet crew nut and rivet screw nut produced by the process
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CN201636181U (en) * 2009-12-14 2010-11-17 贵州航天精工制造有限公司 Autolocking rivet nut for preventing rotation

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103076165A (en) * 2012-12-27 2013-05-01 中国航空工业集团公司金城南京机电液压工程研究中心 Self-locking V-shaped structure nut detection method
CN103586633A (en) * 2013-10-31 2014-02-19 江西洪都航空工业集团有限责任公司 Method for machining stainless steel singe dual-lug support plate nut
CN105387053A (en) * 2015-12-14 2016-03-09 芜湖恒信汽车内饰制造有限公司 Riveting nut and assembly process thereof
CN107322236A (en) * 2017-06-22 2017-11-07 贵州精立航太科技有限公司 A kind of processing technology of high temperature supporting plate self-lock nut
CN107322236B (en) * 2017-06-22 2019-09-17 贵州精立航太科技有限公司 A kind of processing technology of high temperature supporting plate self-lock nut
CN109185311A (en) * 2018-10-30 2019-01-11 贵州航瑞科技有限公司 Titanium alloy tail portion seals earless plate nut and its processing method
CN109210065A (en) * 2018-10-30 2019-01-15 贵州航瑞科技有限公司 Titanium alloy earless plate nut and its processing method
CN111069850A (en) * 2019-11-30 2020-04-28 河南航天精工制造有限公司 Method for processing stainless steel tensile high-locking nut
CN113909574A (en) * 2021-09-30 2022-01-11 中国航空工业标准件制造有限责任公司 Groove machining method for earless supporting plate nut

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Application publication date: 20121107